Sports that involve overhead movements and repeated use of the shoulder at your workplace may lead to sliding of the upper arm bone from the glenoid. The dislocation might be a partial dislocation (subluxation) or a complete dislocation causing pain and shoulder joint instability.
Subluxation of the shoulder is diagnosed by a review of your medical history and symptoms, and a thorough physical examination of your shoulder. Your doctor may also recommend X-rays to confirm the diagnosis and identify any fractures of the shoulder joint.
Shoulder Labral Tear
Traumatic injury to the shoulder or overuse of the shoulder (throwing, weightlifting) may cause the labrum to tear. In addition, aging may weaken the labrum leading to injury.